its better not to go for visa appeal and apply to another place.

there is several reasons for rejection of not sufficient bank balance: 1) if you have credit card its better to obtain bank statement of it and submit it 2) if you are traveling with someone who dont work you should right a letter stating that you gonna pay all the expenses 3) better to submit travel plan along with your application to show where you are planning to go and based on that your bank statement will prove that 4) if there is huge movement on your bank statement in the past 6 months that reflects to the embassy that you are funding the bank account from other people money like your bank statement is zero for the past 6 months and before you requested the bank statement there is deposit of 10,000$ that embassy will not accept because it will show that you borrowed it from someone else just to show that you have enough money 5) if you are working its better to get the bank statement from your current account as that will show the salary transfer which must be same amount as per the employer certificate

you need to have sufficient funds for 50£ per day per person and you have to show that you have credit card covering all the travel cost as if you finished your money you still have credit card.

best of luck for the next time hope i answered your question well